Vict ob gallet



(No Model.)

V. GALLET.

ELECTRIC ALARM CLOCK.

Patented May 26 8 z 2., YE W I e w w A. d

\Ynmuto i N. PETERS. Phowmhn m hu. \V-xshmglan. D. C.

UNITED STATES PATENT QFFICEQ VICTOR GALLET, OF BREST, FRANCE.

ELECTRIC ALARM-CLQGK.

SPECIFICATION forming part of Letters Patent No. 318,612, dated May 26,1885.

Application filed September 25, 1884. (No model.) Patented in FranceFebruary 19, 1884, No. 160,391.

To all whom it may concern.-

Be it known that I, VICTOR GALLET, a citizen of the French Republic,residing at Brest, in said French Republic, have invented certain newand useful Improvements in Alarm- Glocks, (for which I have obtainedLetters Patent in France, No. 160,391, under date of February 19, 1884,)of which the following is a specification.

This application relates to means whereby any ordinary clock with butslight alterations in the construction of the dial and the hourhandthereof may be converted into an alarmclock, and the usual mechanismemployed in the ordinary alarm-clocks dispensed with and thealarm-giving devices located at any desired distance from the clock.

To these ends the invention consists in the combination and arrangementof parts whereby the desired results are obtained, all substantially ashereinafter more fully described, and as shown in the accompanyingdrawings, in which Figure 1 illustrates the essential elements of myinvention by a front elevation of a clock to which the same are applied.Fig. 1 is a perspective View of the circuit-closer. Fig. 2 is a likeview of a modified form thereof, and Fig. 3 is a section of theextensible hour-hand on an enlarged scale.

B B indicate abattery composed of a couple of Leclanch or other cells,A, an alarm mechanism of any desired construction and arrangement inelectrical connection with one of the poles of the battery, and as thisclass of alarm mechanisms or electric bells is well known I have deemedit unnecessary either to illustrate or describe the same in detail, asany suitable ordesired mechanism of this class may be employed that willsound an alarm upon a gong or bell for a given time when the circuit isclosed. This battery and alarm mechanism I have shown as arranged in thebase 0 of a clock case or support, though it is obvious that they may belocated at any other desired point on or distant from the clock-supportor clock-case.

Upon the dial D of the clock, which is made of a non-conductor ofelectricity, I arrange two concentric metallic rings, R R, that projectfrom said dial a suitable distance and form between them an annularchannel or groove, G. One of said rings, R, is connected through thealarm mechanism by wires 10 and 10 with, say, the positive pole, and thering R by wire w with the negative pole of the battery B.

The hour-hand H of the clock is preferably made of an isolatingmaterial, and is in that case provided with an adjustable metallicextension, h, arranged to slide on the hand H toward and over and fromthe groove G.

If desired, the hand H may be made of metal and isolated from its arbor,and the extension 7L may be dispensed with by making the hand H of sucha length as to extend over and some distance above the groove; or anextensible hand of metal isolated from its arbor may be employed Eindicates a circuit-closing device composed of two metallic plates, 0,each provided with a contact pin, e, projecting therefrom, said platesbeing isolated from each other by an intervening plate, (1 of rubber orother suitable isolating substance. The form of this contact-piece issegmental, so as to adapt it to slide in the groove G, in which it isheld by frictional contact with the plates R and R.

It is obvious that when the contact-piece E is adjusted within thegroove G, so that its pins 0 will stand opposite an hour-indication onthe dial or opposite an indication marking a fraction of an hour, themoment the metallic hand H or its extension h passes over the pins infrictional contact therewith the circuit will be closed and the alarmmechanism set in operation.

The simple removal of the contact-piece E or the sliding of theextension h of the hourhand H within the inner ring will leave the clockin its normal condition of operation and cut the alarm mechanism out ofoperation.

Any suitable means may be employed to make the hour-hand extensible. Forinstance, as shown in Fig. 3, the extension h of the hand H carries aband or loop, h, that embraces the hand II and slides thereon, whilesaid extension is arranged to slide in a like band or loop, if, securedto the hand H.

These devices may be variously modified without departing from thenature of my invention. For instance, instead of rings It B metallicstrips may be arranged to form a duodecagon, the groove of which hastherefore twelve subdivisions which may be arranged to thereof cons;i'llCi'Ctl to opcrziie (1S 2L tiineintlex extend from hour to hour and asqunr p and circuit-closer, or a time-index only of an lygonalcontact-piece, E, Fig. 2, 1111i then he electric circuit the isolut (lterminals oi which employed and set into any one of the suhhirisi l (lin and adjustable along the path 5 ions in which it may be adjusted tothe lit ur or i unil, and. an alarm. mechanism inszzio electric circuit,for the pur half-hour, as the case may be. \ihen tne contact-piece E haseontzictpins c, it is necessary to adjust the hour hand with greatnicety, so piece, on electric eircuithaving that said hand will pass inlrctlonnl contact the path of one of thchznuls 01 IO over the pins, asit is evident that if tire hzurl and. 1111 uhirnr mechanism inis notsett-o the proper elevation the pins 0 may electric circuit, in(Olllblllilr stop itsi'ur'her movement, or suial hmnls I, i the haunt;oi the time-piece, 5 pass over the pins Without contacting there l heerzicnzleal or lengthened and with. To avoid ti1is,inste:ul of he pins,ilw i-closer, an." described for the 1g contact-springs may be employedhuvi riggsiir- 'licd. icce the combination of the 7 zzlhc ring: zirrung'cd thereon,

ficient plialiility to enable the hornor its extension h toovercomelhcir rcsi said spring may also he secured he; ixonirfllr "(iictnincctczl with the rings, to lllGlnClLiLlllCplQiQS c, and metric tocur no.1 an mini-:11 incchzixiszn 1i1l I'} Oi-;L(l in said circuit withco rtuch.

:0 wartlly into then-nth oi the hand, \rnicn may then slitleinfrictional contuct ea or lipid nets of the circn t, springs.

'ihe hz'uius ol' the i'inio- 5 we cruenzleil over the coin ,l'Cll'Oill,unrlcrscribcll, l'or top of the clock-ease, am 25 other convcnicntpointCris or both the battery and illzl rcgoing I i 's Zoth tiny of clock.

Having thus purticulzirly described in i 30 inventionnvhat I claim, anddesire to secure by otters Patent, is

1. In a time-piece, the comb s't-zintizilly as rlescrihetlwith one 01 L

